Phosphate Coatings Pretreatment rau Steel Substrates

Phosphate Coatings Pretreatment rau Steel Substrates

Kev lees paub ua ntej kev kho mob rau steel substrates ua ntej siv cov hmoov yog phosphating uas tuaj yeem sib txawv hauv qhov hnyav.

Qhov ntau dua qhov hloov dua siab tshiab txheej hnyav qhov ntau dua qhov kev tiv thaiv corrosion ua tiav; qhov qis txheej txheej hnyav qhov zoo dua cov khoom siv kho tshuab.

Yog li ntawd, nws yog ib qho tsim nyog los xaiv ib qho kev sib haum xeeb ntawm cov khoom siv kho tshuab thiab kev tiv thaiv corrosion. High phosphate txheej hnyav tuaj yeem ua teeb meem nrog hmoov txheej nyob rau hauv uas siv lead ua tawg tuaj yeem tshwm sim thaum lub txheej yog raug siv rau hauv lub zog siv tshuab, xws li. khoov lossis cuam tshuam.

Vim lub adhesion zoo heev ntawm cov hmoov txheej rau phosphate txheej, disbondment feem ntau yuav tshwm sim ntawm phosphate / hlau substrate interface es tsis yog ntawm phosphate / hmoov txheej interface.

Phosphate coatings yog them los ntawm BS3189/1959, Class C rau zinc phosphate thiab Class D rau hlau phosphate.
Ib qho zoo grain crystalline zinc phosphate yog pom zoo ntawm txheej hnyav ntawm 1-2g / m2 thiab rau hlau phosphate ntawm 0.3-1g / m2. Daim ntawv thov tuaj yeem ua los ntawm tshuaj tsuag lossis dip. Chromate passivation feem ntau tsis tsim nyog.

Hlau phosphate txheej feem ntau yog siv rau hauv peb lossis plaub theem ua haujlwm. Kev ua haujlwm feem ntau dhau los ntawm ob ntu dej yaug ua ntej ziab.

Zinc phosphate tuaj yeem yog tshuaj tsuag lossis dip siv hauv tsib theem ua haujlwm, piv txwv li. alkali degrease, yaug, zinc phosphate, ob dej yaug.

Nws yog ib qho tseem ceeb uas lub workpiece tom qab phosphating yog hmoov coated sai li sai tau tom qab ziab.

Phosphate Coatings Pretreatment